皮皮学，免费搜题
登录
搜题
【简答题】
&3.以下程序是:由长方形类派生出正方形类,正方形类的构造方法调用其基类的构造方法。请补充空白处代码: static void Main(string[] args) { Console.WriteLine("请输入正方形的长:"); Square s = new Square(double.Parse(Console.ReadLine())); Console.WriteLine("正方形的面积为:{0}", s.Area()); Console.ReadKey(); } } class Rectangle { protected double length; private double width; public Rectangle(double l, double w) { length = l; width = w; } } class Square : Rectangle { public Square(double l) : { } public double Area() { return length * length; } }
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】He’s aiming ________a prize. That is why he puts his heart ________ his work.
A.
at; of
B.
to; off
C.
for; away
D.
at; into
【单选题】My friend Jack looks fine, he always ______a smile _____his face.
A.
wears; on
B.
puts; on
C.
puts; in
D.
wear; on
【单选题】If a Brazilian puts his thumb and index (食指) into a circle, it shows that he ______ you.
A.
will be friends with
B.
is not satisfied with
C.
is willing to help
D.
is satisfied with
【简答题】语音同自然界其他声音有何异同? prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
【简答题】为测定Na 2 CO 3 与Na 2 SO 3 混合物中各组分的含量，取样品23.2g以如图所示装置进行实验：（铁架台、铁夹等仪器未在图中画出） （1）仪器F的作用是______． （2）已知仪器C中装有品红溶液，其作用是______，有人提出该溶液可能引起Na 2 CO 3 含量的测量结果比实际值偏低，理由是______． （3）实验室中备有以下常用试剂：a．浓硫酸 b．品红溶液 c．酸性高...
【单选题】—Tom’s desk is always clean and tidy. —Yes, he his school things every day.
A.
puts away
B.
puts on
C.
puts out
D.
puts up
【单选题】The little boy often _________ glasses, and he likes to go for a walk _______ his dog. [ ]
A.
puts on; with
B.
wears; with
C.
puts on; has
D.
wears; has
【简答题】连词成句。 1. on, his, scarf, puts, he ______________________________________________ 2. her, boots, she, off, takes ______________________________________________ 3. skate, the, ice, I, on _______________...
相关题目：